In 1917 and 1918, approximately 24 million men, (98 percent of men present in America), born between 1872 and 1900 completed draft registration cards. During these two years, three registration days were held in each district where the registrant completed the registration card. Information found on these cards generally included, among other information, birth date, birth location, father's birthplace, and the address of next of kin. This civilian registration is often confused with induction into the
military; however, only a small percentage of these men were actually called up for military service.
It should be noted that aliens were required to register but were not subject to induction into the American military. Persons already in the military did not register. Also, men who resided in British territories sometimes listed themselves simply as British citizens without noting their origin in Canada, Australia, Ireland, etc. (Description and information excerpted from Ancestry.com)

These records are excerpts from the microfilmed draft cards, and
were transcribed by Nancy Mauro while searching for possible connections to her
own family. They include only individuals who were or appeared to be of Irish
origin. If you are interested in a particular person listed in this index, you
can contact Nancy at ntmauro@tampabay.rr.comand she will send you a copy of the complete card, which will include the
individual's signature. We greatly appreciate Nancy's efforts and her
contribution of this material, as well as her generous offer to provide copies
to interested individuals.